A reactor requires [b] Btu to raise its temperature from [ti] °C to [tf] °C.  What is the heat capacity of the reactor?  Express your answer in Btu/°C, but do not include units in your answer.

A team of engineers and operators are bringing an alkylating unit into production for the first time.  The reaction converts toluene to propylbenzene by reacting it with ethylene according to the following reaction: toluene2propylbenzene.png After reacting, the product is piped over to a distillation unit, and the distilled product is stored in a storage tank.  If the team converts [t] pounds of toluene to product and collects [p] pounds of propylbenzene in the storage tank, what was the percent yield of the process?  You do not need to include a percent sign in your answer, just the number. (Hint:  the molecular weights of toluene and propylbenzene are given in the picture describing the reaction.  If you are clever about it, you don’t need any more information or to do any stoichiometry to find the answer.  You can still solve it with stoichiometery, but it will take a bit longer…)  

Match each conversion with the correct mathematical operation.  Some answers may be used more than once, some may not be used.

The outer shell of an atom is known as its 1) ________________ shell.

Calculate the energy required to heat [w] grams of water by 15°C.  Give your answer in Joules (units not required in the answer.)  The specific heat of water is 4.184 J / (g • °C).

Fill in the blanks of the following passage with the best answers.  Some answers may be used more than once, some may not be used. 1)______________________ is a type of experiment or study for measuring heat flow.  There are a number of kinds of instruments for such experiments.  Perhaps one of the simplest is the 2)_______________________, which uses a well-insulated styrofoam cup filled with a known quantity of water, covered with an insulated lid, and a thermometer to measure the temperature of the water.  A more complex (and expensive!) setup, known as a 3)______________________ uses a very strong steel chamber with a triggering device to initiate the process being studied, which is immersed in a water bath with a thermometer to measure temperature changes.  Both operate on essentially the same principle — the process heats (or cools) the water, causing a temperature change.  The measured temperature change, along with the known 4)____________________ of the instrument, allows for calculation of the energy absorbed (or released) by the water, which is equal to the energy released (or absorbed) by the system under study.

Match the following elements with the correct number of valence electrons for the neutral atom.

For each group of elements, give the preferred ionization (charge) state when ionized.  Some answers may be used more than once, some may not be used.

For the following reaction, calculate how many moles of FeCl3 are produced if [x] grams of Cl2 are reacted with sufficient Fe. 2 Fe(s) + 3 Cl2(g) –> 2 FeCl3(s)

Choose the best answers to fill in the blanks in the following passage.  Some answers may be used more than once, or not used at all. Chemical reactions may be classified into reaction ‘types.’  There are many such possible systems, but one way is to organize reactions according to whether materials are coming together, breaking down, or changing bonding partners.  In a 1)______________________ reaction, two or more materials combine to produce a single product.  In a 2)_____________________ reaction, one material is broken down into two or more products.  In a 3)___________________ reaction, one element is replaced for another in a compound.  Finally, in a 4)____________________reaction, two materials ‘swap’ bonding partners, to generate two new products.